Spring Boot实现JWT token自动续期的实现

//创建token
String token = JwtUtil.createToken(sysUser.getId(), user.getUserName());
 //将token放入redis中,key为用户的手机号+"token"
redisUtil.set(sysUser.getPhone() + GlobalConstant.TOKEN, token, JwtUtil.EXPIRE_TIME*2);

	 
    private boolean refreshToken(SysUser sysUser) {
        String token = request.getHeader(GlobalConstant.TOKEN);
        String cacheToken = (String) (redisUtil.get(sysUser.getPhone() + GlobalConstant.TOKEN));
        //请求头中不存在token，返回false
        if (StringUtil.isEmpty(token)) {
            logger.error("token不存在");
            return false;
        }
        //用户是否登录只根据redis中token是否存在决定，redis中不存在token，返回false
        if (StringUtil.isEmpty(cacheToken)) {
            logger.error("用户未登录");
            return false;
        }
        try {
            //验证请求头中的token是否合法
            JwtUtil.verify(token);
        } catch (TokenExpiredException tokenExpiredException) {
            
            if (redisUtil.hasKey(sysUser.getPhone() + GlobalConstant.TOKEN)) {
                //生成新的token，并以之前的key作为key放入redis中,以此重新刷新redis中的token的过期时间
                String newToken = JwtUtil.createToken(sysUser.getId(), sysUser.getUserName());
                redisUtil.set(sysUser.getPhone() + GlobalConstant.TOKEN, newToken, JwtUtil.EXPIRE_TIME * 2);
                return true;
            }
        } catch (Exception e) {
            //若抛出除token过期异常之外的其他异常，说明该token不合法
            logger.error("token不合法");
            return false;
        }
        return true;
    }

import com.admin.common.constant.GlobalConstant;
import com.auth0.jwt.JWT;
import com.auth0.jwt.alGorithms.Algorithm;

import javax.servlet.http.HttpServletRequest;
import java.util.Calendar;
import java.util.Date;

public class JwtUtil {
    
    public static final String TOKEN_SECRET_KEY = "tokenSecreTKEy";
    
    public static final int EXPIRE_TIME = 60;

    
    public static String createToken(Long userId, String userName) {
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.SECOND, EXPIRE_TIME);
        return JWT.create()
                //签发对象
                .withAudience(userId + "")
                //载荷
                .withClaim("userName", userName)
                //签发时间
                .withIssuedAt(new Date())
                //有效时间
                .withExpiresAt(calendar.getTime())
                //加密
                .sign(Algorithm.HMac256(TOKEN_SECRET_KEY));
    }

    
    public static void verify(String token) {
        JWT.require(Algorithm.HMAC256(TOKEN_SECRET_KEY)).build().verify(token);
    }

 	
    public static Long getUserIdByToken(HttpServletRequest request) {
        String token = request.getHeader(GlobalConstant.TOKEN);
        String userId = JWT.decode(token).getAudience().get(0);
        return Long.valueOf(userId);
    }
}